/*
 * EnigmaGM - A feature rich guild management system.
 * Copyright (C) 2007 ajiaojr.
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */
package org.ajiaojr.enigmagm.client.data.viewer;

/**
 * @author ajiaojr
 */
public abstract class ContentProvider {
  protected ContentListenerCollection contentListeners =
      new ContentListenerCollection();

  public boolean addContentListener(ContentListener listener) {
    return contentListeners.add(listener);
  }

  public abstract void inputChanged(Object input);

  public boolean removeContentListener(ContentListener listener) {
    return contentListeners.remove(listener);
  }
}
